gov.noaa.ngdc.mgg.dem:645eng; USAutf8datasetDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of CommerceDEM Informationdem.info@noaa.govpointOfContact2015-03-20ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded DataISO 19115-2:2009(E)2row3000.033333column8700.033333vertical1areaWorld Geodetic System 1984WGS 842007-08-27revisionhttp://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326WGS 84GML of World Geodetic System 1984 coordinate reference system.informationresourceProviderEuropean Petroleum Survey Grouphttp://www.epsg-registry.org/European Petroleum Survey Group Geodetic Parameter RegistryRegistry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.searchpublisherurn:ogc:def:crs:EPSG::4326Mean High Water heightMHW height2012-08-05revisionhttp://www.epsg-registry.org/export.htm?gml=urn:ogc:def:datum:EPSG::5868MHW heightGML for Mean High Water height available at the epsg-registry.informationresourceProviderEuropean Petroleum Survey Grouphttp://www.epsg-registry.org/European Petroleum Survey Group Geodetic Parameter RegistryRegistry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.searchpublisherurn:ogc:def:datum:EPSG::58682 minute Southcentral Alaska Elevation Grid2004-06-23publication2004NOAA/PMEL/Center for Tsunami Research (NCTR)NOAA Center for Tsunami Research7600 Sand Point Way NE, Bldg 3SeattleWashington98115USAoar.pmel.time-support@noaa.govhttp://www.nctr.pmel.noaa.gov/index.htmlNOAA Center for Tsunami ResearchNOAA/PMEL/Center for Tsunami Research (NCTR)informationpublishermapDigitalAlaska GridsSouthcentral Alaska 2004The 2-minute Southcentral Alaska Elevation Grid provides bathymetric data in ASCII raster format of 2-minute resolution in geographic coordinates. This grid is strictly for tsunami inundation modelingThis grid was constructed for use in tsunami inundation modelingNGDC, NOS, USGS, USACE, AKRRcompletedNOAA/PMEL/Center for Tsunami Research (NCTR)NOAA Center for Tsunami Research7600 Sand Point Way NE, Bldg 3SeattleWashington98115USAoar.pmel.time-support@noaa.govhttp://www.nctr.pmel.noaa.gov/index.htmlNOAA Center for Tsunami ResearchNOAA/PMEL/Center for Tsunami Research (NCTR)informationpublisherirregularEarth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor TopographyEarth Science > Oceans > Bathymetry/Seafloor Topography > BathymetryEarth Science > Oceans > Bathymetry/Seafloor Topography > Water DepthDEM > Digital Elevation ModelthemeNASA/GCMD Platform KeywordsDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of CommerceWDC/MGG, BOULDER > World Data Center for Marine Geology and Geophysics, BoulderthemeNASA/GCMD Data Center KeywordsH: 1 meter - < 30 metersV: < 1 meterthemeNASA/GCMD Data Resolution KeywordsCoastal ReliefGridded elevationsthemeUncontrolledContinent > North America > United States of America > Southcentral AlaskaAlaskaOcean > Pacific OceanVertical Location > Land SurfaceVertical Location > Sea FloorplaceNASA/GCMD Location KeywordsSouthcentral AlaskaGulf of AlaskaplaceUncontrolled2004temporalNoneNot to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.grideng; USAgeoscientificInformationNative Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.4.1420-169.00-140.0052.0062.00This grid was developed through funding from the National Tsunami Hazard Mitigation Program. It will be updated as better data become available.ESRI Arc ASCII1ASCII text version of ESRI ArcGIS raster formatWINZIPDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of CommerceDEM Informationdem.info@noaa.govpointOfContacthttp://www.ngdc.noaa.gov/dem/squareCellGrid/searchDEM text search toolText search tool for locating completed and planned DEMs.searchhttp://www.ngdc.noaa.gov/dem/squareCellGrid/mapMap InterfaceGraphic geo-spatial search tool for locating completed and planned DEMs.searchdatasetHorizontal Positional Accuracy ReportThe horizontal accuracy of the grid is expressed as an estimated root mean square error (RMSE). The estimate of the RMSE is based on horizontal accuracy tests of the source data which are selected as equal to or less than the intended horizontal RMSE error of the grid. Horizontal positioning of the various source point were compared with each other to verify grid accuracy.Vertical Positional Accuracy ReportThe vertical RMSE is used to determine vertical accuracy of the grid. It accounts for systematic and random errors. The accuracy of bathymetric sounding are within 2% of depth.Errant data points were removed from the various sources before processing the grid. The final grid was visually and statistically inspected for completeness using ArcGIS.Each data set went through a stringent quality control procedure from their respective originators. The developed grid was compared with initial sources, other source control data, and corresponding data between datasets to verify accuracy.Each raw data source was converted into ESRI ArcGIS formats. The resulting files were converted and adjusted to predetermined projection (geographic), horizontal datum (NAD27), and vertical datum (MHW) using the ArcInfo PROJECT command and ArcView Spatial Analyst MAP CALCULATOR algorithm. A polyline shapefile was created to represent the coastline. The coastline is a culmination of USGS hydrographic vectors, USACE coastline, and AKRR coastline vectors. A TIN (Triangulated Irregular Network) was created using bathymetric data point and coastline points using ArcInfo CREATETIN. An 8-second grid was created using TINLATTICE. A 2-minute grid was created using Smith and Sandwell data to fill in remaining gaps. Smith and Sandwell data was compared with denser data to ensure continuity. The data was assessed for quality using ArcView Spatial Analyst. The grid was compared to its raw dataset. The 8-second grid was resampled to 2 minutes and merged with the Smith and Sandwell data. The grid was updated with recent datasets surrounding Homer-Seldovia, Kodiak, and Seward. New data was incorporated into the grids by creating new TINs for the regional area. Data were assessed for quality by comparing with original sources, corresponding sources, and control data. Continuity between old and new data were assessed and errors were corrected. The final grid was analyzed for blunders, systematic errors, and logical consistency.2004-06-01T00:00:00NOAA/PMEL/Center for Tsunami Research (NCTR)NOAA Center for Tsunami Research7600 Sand Point Way NE, Bldg 3SeattleWashington98115USAoar.pmel.time-support@noaa.govhttp://www.nctr.pmel.noaa.gov/index.htmlNOAA Center for Tsunami ResearchNOAA/PMEL/Center for Tsunami Research (NCTR)informationpublisherSource Contribution: bathymetric data values; Source Type: onlineGEODAS Vol 2, Ver 4.2 and Global Relief2004-01-01publicationNOAA National Geophysical Data CenteroriginatorData obtained include Smith and Sandwell 2-minute bathymetric data, NOS Hydrographic Surveys, and Marine Trackline Data1890-01-012001-01-01Source Contribution: bathymetric data values; Source Type: onlineElectronic Nautical Charts2002-01-01publicationNOAA NOS Office of Coast SurveySilver SpringMaryland, USApublisherNOAA National Ocean Service, Office of Coast Surveyoriginator2001-01-012003-01-01Source Contribution: bathymetric data values; Source Type: CD-ROMMultibeam surveys for Seward OPR-P359-RA-012001-01-01publicationNOAA NOS Office of Coast Survey, Pacific Hydrographic BranchSeattleWashington, USApublisherNOAA National Ocean Service, Office of Coast SurveyoriginatorPreliminary data not for navigation or public2001-01-01Source Contribution: shoreline, mean high water line; Source Type: online1:25000 and 1:63360 hydrographic vectorspublicationUSGS National Mapping DivisionRestonVirginia, USApublisherUSGS National Mapping DivisionoriginatorSource Contribution: bathymetric and coastline data values; Source Type: onlineHomer, Seldovia, and Seward Hydrographic Surveys2002-01-01publicationUSACE Alaska DistrictAnchorageAlaska, USApublisherU.S Army Corps of Engineers Alaska Districtoriginator2000-01-012002-01-01Source Contribution: bathymetric and coastline data values; Source Type: CD-ROMBathymetric Condition Survey2001-01-01publicationAlaska Railroad CorporationAnchorageAlaska, USApublisherAlaska Railroad Corporationoriginator2001-01-01annuallyThis metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-07-27 version of the FGDC RSE to ISO 19115-2 transform for DEMs.Last Translation from FGDC 2013-01-03T10:03:32.816-07:00Last Metadata Review Date: 2004-06-28Kelly CarignanDOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commercekelly.carignan@noaa.govpointOfContact